What do you mean by "Tactical", what kind of "Tactical" things will you be doing, my guess is, most likely cutting paper and rubbing one out with your friends over how tactical operator you are with your tactical blade. Seriously I'm getting so sick of this word, how does a knife have anything to do with the use of tactics in a combat situation.
Ok... so first off lets get real, chances are you want a coated blade, with fast opening and mean looks to boot. Now I KNOW your probably thinking a serrated tanto, but **** that, it's the most useless blade shape out there.
Good news is, there are alot of blades that fit the bill, actually way to many, but some quality knives that actually are useful would be one of these
-Benchamde 710,950,730,615 etc
-Kersahw Blur and shallot models
-Spyderco Para-Militaries, Endura, Police etc
-Lone wolf t2 etc
-Emerson if you really want, but the chisel edge, and other things make them a bit cumbersome.
All of these knives will be more than enough for everyday tasks, and offer good blade length if your thinking about ever using them for defensive use.
If your looking for a heavy duty folder, get a fixed blade, or a pry bar. If you envision yourself using a folder so hard, that it would break any one of the well built knives listed above, chances are your doing something with a knife you should not be doing. I would say the that the zt 300 series (as mentioned many times) is probably one of the most rugged feeling knives I own, but its large size, and high weight for little reach (compared to slimmer longer bladed models) make it kind of awkward as a practical Large EDC choice.
Once you actually get around to using your knives everyday you will find that alot of this tactical crap is useless half the time, Get a good well made folder with a decent blade length to it, and with training and the will to fight, anything can be used as a tool to defend your life. Doesn't matter if it says benchmade, kershaw or spyderco on the side.